/// <summary>
/// Gets an item value
/// </summary>
/// <param name="guidKey">GUID of the key.</param>
/// <returns>The value associated to this key.</returns>
/// <msdn-id>ms704598</msdn-id>
/// <unmanaged>HRESULT IMFAttributes::GetItem([In] const GUID& guidKey,[In] void* pValue)</unmanaged>
/// <unmanaged-short>IMFAttributes::GetItem</unmanaged-short>
public unsafe T Get <T>(MediaAttributeKey <T> guidKey)
{
return(Get <T>(guidKey.Guid));
}
/// <summary>
/// <p><strong>Applies to: </strong>desktop apps | Metro style apps</p><p> Adds an attribute value with a specified key. </p>
/// </summary>
/// <param name="guidKey"><dd> <p> A <see cref="System.Guid"/> that identifies the value to set. If this key already exists, the method overwrites the old value. </p> </dd></param>
/// <param name="value"><dd> <p> A <strong><see cref="SharpDX.Win32.Variant"/></strong> that contains the attribute value. The method copies the value. The <strong><see cref="SharpDX.Win32.Variant"/></strong> type must be one of the types listed in the <strong><see cref="SharpDX.MediaFoundation.AttributeType"/></strong> enumeration. </p> </dd></param>
/// <returns><p> The method returns an <strong><see cref="SharpDX.Result"/></strong>. Possible values include, but are not limited to, those in the following table. </p><table> <tr><th>Return code</th><th>Description</th></tr> <tr><td> <dl> <dt><strong><see cref="SharpDX.Result.Ok"/></strong></dt> </dl> </td><td> <p> The method succeeded. </p> </td></tr> <tr><td> <dl> <dt><strong>E_OUTOFMEMORY</strong></dt> </dl> </td><td> <p> Insufficient memory. </p> </td></tr> <tr><td> <dl> <dt><strong>MF_E_INVALIDTYPE</strong></dt> </dl> </td><td> <p> Invalid attribute type. </p> </td></tr> </table><p>?</p></returns>
/// <remarks>
/// <p> This method checks whether the <strong><see cref="SharpDX.Win32.Variant"/></strong> type is one of the attribute types defined in <strong><see cref="SharpDX.MediaFoundation.AttributeType"/></strong>, and fails if an unsupported type is used. However, this method does not check whether the <strong><see cref="SharpDX.Win32.Variant"/></strong> is the correct type for the specified attribute <see cref="System.Guid"/>. (There is no programmatic way to associate attribute GUIDs with property types.) For a list of Media Foundation attributes and their data types, see Media Foundation Attributes. </p><p>This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:</p><ul> <li>Windows?XP with Service Pack?2 (SP2) and later.</li> <li>Windows?XP Media Center Edition?2005 with KB900325 (Windows?XP Media Center Edition?2005) and KB925766 (October 2006 Update Rollup for Windows?XP Media Center Edition) installed.</li> </ul>
/// </remarks>
/// <msdn-id>bb970346</msdn-id>
/// <unmanaged>HRESULT IMFAttributes::SetItem([In] const GUID& guidKey,[In] const PROPVARIANT& Value)</unmanaged>
/// <unmanaged-short>IMFAttributes::SetItem</unmanaged-short>
public unsafe void Set <T>(MediaAttributeKey <T> guidKey, T value)
{
Set(guidKey.Guid, value);
}
/// <summary>
/// <p><strong>Applies to: </strong>desktop apps | Metro style apps</p><p>Gets an attribute from the underlying media source.</p>
/// </summary>
/// <param name="dwStreamIndex"><dd> <p>The stream or object to query. The value can be any of the following.</p> <table> <tr><th>Value</th><th>Meaning</th></tr> <tr><td> <dl> <dt>0?0xFFFFFFFB</dt> </dl> </td><td> <p>The zero-based index of a stream.</p> </td></tr> <tr><td><dl> <dt><strong><strong><see cref="SharpDX.MediaFoundation.SourceReaderIndex.FirstVideoStream"/></strong></strong></dt> <dt>0xFFFFFFFC</dt> </dl> </td><td> <p>The first video stream.</p> </td></tr> <tr><td><dl> <dt><strong><strong><see cref="SharpDX.MediaFoundation.SourceReaderIndex.FirstAudioStream"/></strong></strong></dt> <dt>0xFFFFFFFD</dt> </dl> </td><td> <p>The first audio stream.</p> </td></tr> <tr><td><dl> <dt><strong><strong><see cref="SharpDX.MediaFoundation.SourceReaderIndex.Mediasource"/></strong></strong></dt> <dt>0xFFFFFFFF</dt> </dl> </td><td> <p>The media source.</p> </td></tr> </table> <p>?</p> </dd></param>
/// <param name="guidAttribute"><dd> <p>A <see cref="System.Guid"/> that identifies the attribute to retrieve. If the <em>dwStreamIndex</em> parameter equals <strong><see cref="SharpDX.MediaFoundation.SourceReaderIndex.Mediasource"/></strong>, <em>guidAttribute</em> can specify one of the following:</p> <ul> <li>A presentation descriptor attribute. For a list of values, see Presentation Descriptor Attributes.</li> <li> <see cref="SharpDX.MediaFoundation.SourceReaderAttributeKeys.MediaSourceCharacteristics"/>. Use this value to get characteristics flags from the media source.</li> </ul> <p>Otherwise, if the <em>dwStreamIndex</em> parameter specifies a stream, <em>guidAttribute</em> specifies a stream descriptor attribute. For a list of values, see Stream Descriptor Attributes.</p> </dd></param>
/// <returns>a <strong><see cref="SharpDX.Win32.Variant"/></strong> that receives the value of the attribute.</returns>
/// <remarks>
/// <p>This interface is available on Windows?Vista if Platform Update Supplement for Windows?Vista is installed.</p>
/// </remarks>
/// <msdn-id>dd374662</msdn-id>
/// <unmanaged>HRESULT IMFSourceReader::GetPresentationAttribute([In] unsigned int dwStreamIndex,[In] const GUID& guidAttribute,[Out] PROPVARIANT* pvarAttribute)</unmanaged>
/// <unmanaged-short>IMFSourceReader::GetPresentationAttribute</unmanaged-short>
public T GetPresentationAttribute <T>(SourceReaderIndex dwStreamIndex, MediaAttributeKey <T> guidAttribute)
{
var variant = GetPresentationAttribute((int)dwStreamIndex, guidAttribute.Guid);
return((T)Convert.ChangeType(variant.Value, typeof(T)));
}